Patents by Inventor Chester L. Sandberg
Chester L. Sandberg has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9290273Abstract: Invention is an adaptive freeze, snow or ice protection system and method of operation that comprises an integrated expert system control module, a sensing means, a heating means, a control system means, an interconnection means and an energy supply system means where the protection system is supplied with an external energy source. The integrated expert system control module has a learning algorithm that performs adaptive analysis using input from conventional and unique sensors as the sensing means, other available inputs and other available data to monitor all of the systems of the protection system and provides commands to control all the systems of the protection system that manage the possible effects of predetermined environmental conditions on facilities or equipment.Type: GrantFiled: June 27, 2013Date of Patent: March 22, 2016Inventors: James C. Thompson, Chester L. Sandberg
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Patent number: 8742604Abstract: Systems and methods for combined flow control and electricity generation are described. Various embodiments may include an energy recovery device adapted to produce an electric current. At least a portion of the electric current may be used to power a pump. A control system may be adapted to adjust operating parameters of the system to stabilize or maximize the efficiency of the energy recovery device.Type: GrantFiled: June 6, 2012Date of Patent: June 3, 2014Assignee: Energy Recovery, Inc.Inventors: Timothy Dyer, Mark Richter, Rafael Andres Bañados Contreras, Chester L. Sandberg
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Publication number: 20130328310Abstract: Systems and methods for combined flow control and electricity generation are described. Various embodiments may comprise an energy recovery device adapted to produce an electric current. At least a portion of the electric current may be used to power a pump. A control system may be adapted to adjust operating parameters of the system to stabilize or maximize the efficiency of the energy recovery device.Type: ApplicationFiled: June 6, 2012Publication date: December 12, 2013Inventors: Timothy Dyer, Mark Richter, Rafael Andres Bañados Contreras, Chester L. Sandberg
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Patent number: 8410892Abstract: A three-terminal device (1, 21, 31) which can operate as an electrical switch, controlled by a third terminal (3, 24, 36/36A) that controls switching the device (1, 21, 31) from a closed circuit (conducting) state to an open circuit (insulating) state. Polymer and/or ceramic materials are loaded with different conductive materials, forming a device (1, 21, 31) having various electrical conductivities depending on local temperature. In preferred embodiments, the device (1, 21, 31) exhibits a non-linear increase or decrease in resistance versus temperature. Various embodiments of the three-terminal devices (1, 21, 31) are disclosed. The third terminal (3, 24, 36/36A) may be a non-electrically conductive biasing element such as a thermal transfer rod or tube containing a variable temperature fluid.Type: GrantFiled: August 17, 2011Date of Patent: April 2, 2013Inventor: Chester L. Sandberg
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Publication number: 20120044041Abstract: A three-terminal device (1, 21, 31) which can operate as an electrical switch, controlled by a third terminal (3, 24, 36/36A) that controls switching the device (1, 21, 31) from a closed circuit (conducting) state to an open circuit (insulating) state. Polymer and/or ceramic materials are loaded with different conductive materials, forming a device (1, 21, 31) having various electrical conductivities depending on local temperature. In preferred embodiments, the device (1, 21, 31) exhibits a non-linear increase or decrease in resistance versus temperature. Various embodiments of the three-terminal devices (1, 21, 31) are disclosed. The third terminal (3, 24, 36/36A) may be a non-electrically conductive biasing element such as a thermal transfer rod or tube containing a variable temperature fluid.Type: ApplicationFiled: August 17, 2011Publication date: February 23, 2012Inventor: Chester L. Sandberg
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Patent number: 7360588Abstract: A process may include providing heat from one or more heaters to at least a portion of a subsurface formation. Heat may transfer from one or more heaters to a part of a formation. In some embodiments, heat from the one or more heat sources may pyrolyze at least some hydrocarbons in a part of a subsurface formation. Hydrocarbons and/or other products may be produced from a subsurface formation. Certain embodiments describe apparatus, methods, and/or processes used in treating a subsurface or hydrocarbon containing formation.Type: GrantFiled: October 17, 2006Date of Patent: April 22, 2008Assignee: Shell Oil CompanyInventors: Harold J. Vinegar, Peter Veenstra, Steven Paul Giles, Chester L. Sandberg, Frederick Henry Kreisler Rambow, Christopher Kelvin Harris, Lanny Gene Schoeling, Mark Gregory Picha, Etuan Zhang, Gary Beer, Frederick Gordon Carl, Jr., Taixu Bai, Dong Sub Kim, Michael David Fairbanks, Guillermo Pastor Sanz
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Patent number: 7121342Abstract: A process may include providing heat from one or more heaters to at least a portion of a subsurface formation. Heat may transfer from one or more heaters to a part of a formation. In some embodiments, heat from the one or more heat sources may pyrolyze at least some hydrocarbons in a part of a subsurface formation. Hydrocarbons and/or other products may be produced from a subsurface formation. Certain embodiments describe apparatus, methods, and/or processes used in treating a subsurface or hydrocarbon containing formation.Type: GrantFiled: April 23, 2004Date of Patent: October 17, 2006Assignee: Shell Oil CompanyInventors: Harold J. Vinegar, Peter Veenstra, Steven Paul Giles, Chester L. Sandberg, Frederick Henry Kreisler Rambow, Christopher Kelvin Harris, Lanny Gene Schoeling, Mark Gregory Picha, Etuan Zhang, Gary Beer, Fredrick Gordon Carl, Jr., Taixu Bai, Dong Sub Kim, Michael David Fairbanks, Guillermo Pastor Sanz
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Patent number: 6288372Abstract: An electrical cable device such as a heating cable includes a braidless ground return layer surrounding an inner jacket. The ground return layer is formed by a conductive polymer and a ground return wire connected to the conductive polymer. The polymer may be made suitably conductive for ground fault detection by addition of a particulate conductive filler such as carbon black, carbon fibers, or a blend thereof.Type: GrantFiled: November 3, 1999Date of Patent: September 11, 2001Assignee: Tyco Electronics CorporationInventors: Chester L. Sandberg, Albert J. Highe, Jose Gamarra, Lawrence J. White, Frank Orecchia, Ted M. Aune
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Patent number: 4785163Abstract: Method for monitoring the electrical integrity of a heater and a novel heater for use in such a method. The heater includes an elongate heating member; an insulating jacket which encloses the heating member; a first electrically conductive member which surrounds the insulating jacket; a separating and insulating member which surrounds the first conductive member; and a second electrically conductive member which surrounds the first conductive member and is separated and insulated therefrom by the separating member. The method includes the step of testing the electrical relationship between the first and second electrically conductive members.Type: GrantFiled: April 27, 1987Date of Patent: November 15, 1988Assignee: Raychem CorporationInventor: Chester L. Sandberg
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Patent number: 4733057Abstract: A wall, floor or ceiling heater comprises a plurality of self regulating, preferably PTC conductive polymer, heater elements each of which is connected to two or more connection elements. The elements are held by a support. In a preferred embodiment the heater elements are positioned parallel to each other, and perpendicular to the connection elements. The support is preferably made from a rigid material which is hinged to allow the heater to be folded or rolled for easy transport.Type: GrantFiled: April 18, 1986Date of Patent: March 22, 1988Assignee: Raychem CorporationInventors: Erwin K. E. Stanzel, Chester L. Sandberg
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Patent number: 4698583Abstract: Method for monitoring the electrical integrity of a heater and a novel heater for use in such a method. The heater includes an elongate heating member; an insulating jacket which encloses the heating member; a first electrically conductive member which surrounds the insulating jacket; a separating and insulating member which surrounds the first conductive member; and a second electrically conductive member which surrounds the first conductive member and is separated and insulated therefrom by the separating member. The method includes the step of testing the electrical relationship between the first and second electrically conductive members.Type: GrantFiled: March 26, 1985Date of Patent: October 6, 1987Assignee: Raychem CorporationInventor: Chester L. Sandberg
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Patent number: 4417782Abstract: Fiber optic waveguides exhibiting a blackout phenomenon can be used for temperature sensing. A temperature sensing waveguide can be used in such applications as maintaining a material within a selected temperature range, freeze protection viscosity control of liquids in pipelines, leak detection of cryogenic fluids, fire detection, application of heat-recoverable materials, battery charging, and fluid level detection. Novel waveguides exhibiting blackout at selected temperatures for use in these applications are described.Type: GrantFiled: March 31, 1980Date of Patent: November 29, 1983Assignee: Raychem CorporationInventors: Raymond Clarke, Chester L. Sandberg